Re: [gentoo-user] march=k8 for AthlonX2?
Mark Knecht wrote: That surprises me Neil. It seems more 'automatic' than a nuts bolt guy such as you might choose. Well, it seems to do a pretty good job and, with 14 machines with a mix of Intel and AMD processors, it makes maintenance a lot more straightforward. In the past, I spent a lot of time fiddling around with processor/compiler flags only to find that most have little to no noticeable effect in the real world. ;) Be lucky, Neil -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
Omg, we really can use march=native ?? That would be great if true. (sorry for my bad english :) 2008/5/3, Neil Walker [EMAIL PROTECTED]: Mark Knecht wrote: Would I be making a reasonably good setting using this in make.conf? CFLAGS=-O2 -march=k8 -pipe CXXFLAGS=-O2 -march=k8 -pipe That's what I would be using on my single, dual and quad cores if I weren't using -march=native. ;) Be lucky, Neil -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
On Sat, May 3, 2008 at 1:50 AM, Neil Walker [EMAIL PROTECTED] wrote: Mark Knecht wrote: That surprises me Neil. It seems more 'automatic' than a nuts bolt guy such as you might choose. Well, it seems to do a pretty good job and, with 14 machines with a mix of Intel and AMD processors, it makes maintenance a lot more straightforward. In the past, I spent a lot of time fiddling around with processor/compiler flags only to find that most have little to no noticeable effect in the real world. ;) Be lucky, Neil Hey, I ain't pickin' on ya! Makes perfect sense, especially with so many machines. I was just surprised. Thanks for the info, Mark -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
Abraham Gyorgy wrote: Omg, we really can use march=native ?? That would be great if true. Yes, as long as you are using a recent version of gcc which has support for it. I think it came in with gcc 4.2. (sorry for my bad english :) Your English seems fine to me - better than some native English speakers I know. ;) Be lucky, Neil -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
On Sat, 03 May 2008 17:12:03 +0100 Neil Walker wrote: Abraham Gyorgy wrote: Omg, we really can use march=native ?? That would be great if true. Yes, as long as you are using a recent version of gcc which has support for it. I think it came in with gcc 4.2. 4.2 seems right. 4.1.2 is the newest version that is _not_ experimental for x86 and/or amd64. 4.1.2 doesn't support march=native. So the choice seems to be go experimental or wait :- -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
On Samstag, 3. Mai 2008, David Relson wrote: On Sat, 03 May 2008 17:12:03 +0100 Neil Walker wrote: Abraham Gyorgy wrote: Omg, we really can use march=native ?? That would be great if true. Yes, as long as you are using a recent version of gcc which has support for it. I think it came in with gcc 4.2. 4.2 seems right. 4.1.2 is the newest version that is _not_ experimental for x86 and/or amd64. 4.1.2 doesn't support march=native. So the choice seems to be go experimental or wait :- what is the problem? native or k8, what is the difference? Oh wait, if you don't use native you have a bit more control. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
On Saturday 03 May 2008, Volker Armin Hemmann wrote: 4.2 seems right. 4.1.2 is the newest version that is _not_ experimental for x86 and/or amd64. 4.1.2 doesn't support march=native. So the choice seems to be go experimental or wait :- what is the problem? native or k8, what is the difference? Oh wait, if you don't use native you have a bit more control. Makes sense to me. native tells gcc to just figure it out and use what the majority of users would use anyway. The remaining 2% get to figure it out themselves :-) -- Alan McKinnon alan dot mckinnon at gmail dot com -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
Thanks. Unfortunately I'm not using 4.2, but 4.1 http://packages.gentoo.org/package/sys-devel/gcc 4.2 is in testing for amd64. 2008/5/3, Neil Walker [EMAIL PROTECTED]: Abraham Gyorgy wrote: Omg, we really can use march=native ?? That would be great if true. Yes, as long as you are using a recent version of gcc which has support for it. I think it came in with gcc 4.2. (sorry for my bad english :) Your English seems fine to me - better than some native English speakers I know. ;) Be lucky, Neil -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
Mark Knecht wrote: Would I be making a reasonably good setting using this in make.conf? CFLAGS=-O2 -march=k8 -pipe CXXFLAGS=-O2 -march=k8 -pipe That's what I would be using on my single, dual and quad cores if I weren't using -march=native. ;) Be lucky, Neil -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] march=k8 for AthlonX2?
On Fri, May 2, 2008 at 4:14 PM, Neil Walker [EMAIL PROTECTED] wrote: Mark Knecht wrote: Would I be making a reasonably good setting using this in make.conf? CFLAGS=-O2 -march=k8 -pipe CXXFLAGS=-O2 -march=k8 -pipe That's what I would be using on my single, dual and quad cores if I weren't using -march=native. ;) That surprises me Neil. It seems more 'automatic' than a nuts bolt guy such as you might choose. Thanks, Mark -- gentoo-user@lists.gentoo.org mailing list
